Hi Markus,
Which revision of SAP HANA and which version of SHINE did you use? If you use the latest revision of SAP HANA, SHINE is pre-installed and you do not need to reinstall it. If you want to use a new SHINE instead of an old one, you can reinstall it. I've successfully reinstalled SHINE several times and sometimes you need to reimport the DU.
"If you receive errors in activation, reimport the DU.
If an error occurs, it can be because there is no activation sequence maintained in the DU,
even though all the artifacts are inside the DU. When you reimport the DU, the tables are
activated first and then the views are activated."
Best regards,
Wenjun